Newcastle Beach Park Weather Forecast

    • 60
    • 75

    Chance Rain

    • 59
    • 75

    Increasing Clouds

    • 58
    • 76

    Mostly Cloudy

    • 58
    • 76

    Mostly Cloudy

    • 55
    • 76

    Mostly Sunny

    • 56
    • 78

    Mostly Sunny

    • 58
    • 81

    Sunny

Today 16 Aug Eastside

Mostly sunny. A chance of rain in the morning. A slight chance of rain in the late morning and early Afternoon, then a chance of rain late in the afternoon. Highs in the 70s. South wind around 10 Mph becoming southwest in the afternoon. Gusts to 20 Mph.

Tonight 16 Aug Eastside

Mostly cloudy then becoming partly cloudy in the late evening and early morning then becoming mostly cloudy. A chance of Showers in the Evening, then a slight chance of Showers after midnight. Lows near 60. Southwest wind to 10 Mph in the evening becoming light.

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  • Temperature Forecast NOAA

  • Temperature Real-Time

Newcastle Beach Park Temperature Statistics

August Temperature

Renton Municipal Airport (5 miles)

  • Lowest 8 August, 2025

    52.6 °F

  • Average August

    69.8 °F

  • Highest 12 August, 2025

    92.6 °F

Climate (2020–Present)

Renton Municipal Airport (5 miles)

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  • Average Low 2020–2025

    47.3 °F

  • Average 2020–2025

    54.5 °F

  • Average High 2020–2025

    62.2 °F
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